The creative process is a wonderful thing, and once those fantastic ideas are in your head, it can be difficult to let them go - even if that means they will be improved upon.

Lifehack has a great article that addresses this whole process; basically, you need to be willing to listen to possible changes, be open to possibilities, and accept that your idea might not make it in its original form all the way to the finish line (but hopefully the end results will be that much better). — Wendy Boswell